Arm chair



FIG. 1 is a front top-left perspective view of an arm chair showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a left side elevational view the right side being a mirror image;

FIG. 4 is a rear elevational view;

FIG. 5 is a top plan view;

FIG. 6 is a bottom plan view thereof; and

FIG. 7 is a cross-sectional view of FIG. 1 as taken from line 7--7. 

The ornamental design for an arm chair, as shown and described. 